The significance of wire and cable bunched vertical combustion test
With the continuous development of society and the progress of science and technology, wire and cable, as an important part of power transmission and information transmission, plays a vital role in modern society. However, once a fire occurs during the use of wire and cable, the threat to people's lives and property cannot be ignored. In order to improve the fire safety performance of wire and cable, it is of great significance to carry out the wire and cable bundle vertical combustion test.
First of all, the wire and cable bunched vertical combustion test is a means of comprehensively assessing the fire performance of wire and cable. In this test, the cable bundle is placed in a vertical position, simulating the real fire conditions under the wire and cable may face. By measuring the speed of flame propagation, smoke generation and the combustion characteristics of the wire and cable, it is possible to gain a comprehensive understanding of the performance of the cable under fire conditions, providing a strong basis for improving the design and manufacture of wire and cable.
Secondly, the vertical burning test of wire and cable bunches helps to formulate and improve the relevant safety standards. By systematically evaluating the performance of wire and cable under vertical burning conditions, a scientific basis can be provided for the formulation and revision of relevant safety standards for wire and cable. This helps to establish more stringent and reliable technical specifications to improve the resistance and tolerance of wire and cable under fire conditions.
In summary, the significance of wire and cable bunching vertical combustion test is not only reflected in the improvement of the fire safety performance of wire and cable itself, but also lies in the formulation and revision of relevant standards to provide scientific support, as well as to guide the development of fire response and fire suppression technology. By continuously improving the design and manufacture of wire and cable, we can better guarantee the safety of power and information transmission in the society and reduce the hazards caused by fire.
Guangzhou Sunho independently developed and manufactured a wire and cable bunched vertical combustion tester (SH5507A), which is designed according to GB18380.31, GB18380.3-2001 standard of wire and cable bunched combustion test requirements and other relevant regulations, and specifies a type-approved test method for evaluating the ability of bunched cables to inhibit the spread of flames under specified conditions.
Technical parameters:
1, Power supply:AC220V±10%/50Hz.
2, the test box width (1000 ± 100), depth (2000 ± 100), high (4000 ± 100), the bottom of the box should be higher than the ground; test box perimeter should be sealed, the bottom of the box in front of the wall (150 ± 10) mm at the opening of a (800 ± 20) mm × (400 ± 10) mm air intake; in the top of the test box J the back of the top of the box there is a (300 Sh 30) mm × (1) There is an air outlet of (300s30) mm×(1,000±100) mm at the back of the top of the test chamber J.
3, the inner wall of S304 stainless steel, outer 50mm flame retardant insulation colour steel library board.
4, the test box and the device in the metal materials are used 304 stainless steel and other corrosion-resistant materials.
5, the back and both sides of the test box should be wrapped with heat transfer coefficient of about 0.7 W / (m2.K) of thermal insulation materials.
6, equipped with the standard requirements of the steel ladder each 1 set of two pairs, 800 × 3500mm, 500 × 3500mm each pair.
7, Equipped with air flow detection device and regulating air flow device.
8, Thermocouple is installed on the inside of the test box.
9, burner: with type propane gas torch, size 257mm × 4.5mm, a total of 242 holes, arranged in three rows, respectively, 81, 80, 81 holes, hole diameter 6, 1.35mm, the distance between the holes is 3.2mm.
10, double flow meter: air flow and gas flow meter, venturi mixer, automatic ignition device.
11, Propane flow rate is 13.3±0.5L/min, air flow rate is 76.7±4.7L/min.
12, Burning angle:20°.
13, a variety of test parameters digital display.
14, including anemometer, range of not less than 0 ~ 15m / s
15, test fire time: 1 ~ 99min can be set, can record the flameout time.
16, Display: touch screen + PLC intelligent controller
17, With sample lifting pulley mechanism, easy for sample lifting.
